user.eclass: Revert "remove"

Reverts: 4c41709a9e9af1ba6753c61fbc68d49930725e6c
Signed-off-by: Michał Górny <mgorny@gentoo.org>

1 files changed, 684 insertions, 0 deletions

diff --git a/eclass/user.eclass b/eclass/user.eclass
new file mode 100644
index 000000000000..d5b827d2e76b
--- /dev/null
+++ b/eclass/user.eclass
@@ -0,0 +1,684 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: user.eclass
+# @MAINTAINER:
+# base-system@gentoo.org (Linux)
+# Michał Górny <mgorny@gentoo.org> (NetBSD)
+# @SUPPORTED_EAPIS: 6 7 8
+# @BLURB: user management in ebuilds
+# @DEPRECATED: acct-user/acct-group packages
+# @DESCRIPTION:
+# The user eclass contains a suite of functions that allow ebuilds
+# to quickly make sure users in the installed system are sane.
+
+case ${EAPI} in
+	6|7) ;;
+	8)
+		if [[ ${CATEGORY} != acct-* ]]; then
+			eerror "In EAPI ${EAPI}, packages must not inherit user.eclass"
+			eerror "unless they are in the acct-user or acct-group category."
+			eerror "Migrate your package to GLEP 81 user/group management,"
+			eerror "or inherit user-info if you need only the query functions."
+			die "Invalid \"inherit user\" in EAPI ${EAPI}"
+		fi
+		;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
+if [[ -z ${_USER_ECLASS} ]]; then
+_USER_ECLASS=1
+
+inherit user-info
+
+# @FUNCTION: _user_assert_pkg_phase
+# @INTERNAL
+# @USAGE: <calling func name>
+# @DESCRIPTION:
+# Raises an alert if the phase is not suitable for user.eclass usage.
+_user_assert_pkg_phase() {
+	case ${EBUILD_PHASE} in
+	setup|preinst|postinst|prerm|postrm) ;;
+	*)
+		eerror "'$1()' called from '${EBUILD_PHASE}' phase which is not OK:"
+		eerror "You may only call from pkg_{setup,{pre,post}{inst,rm}} functions."
+		eerror "Package has serious QA issues.  Please file a bug."
+		die "Bad package!  ${1} is only for use in some pkg_* functions!"
+	esac
+}
+
+# @FUNCTION: user_get_nologin
+# @INTERNAL
+# @DESCRIPTION:
+# Find an appropriate 'nologin' shell for the platform, and output
+# its path.
+user_get_nologin() {
+	local eshell
+
+	for eshell in /sbin/nologin /usr/sbin/nologin /bin/false /usr/bin/false /dev/null ; do
+		[[ -x ${ROOT}${eshell} ]] && break
+	done
+
+	if [[ ${eshell} == "/dev/null" ]] ; then
+		ewarn "Unable to identify the shell to use, proceeding with userland default."
+		case ${USERLAND} in
+			GNU)    eshell="/bin/false" ;;
+			BSD)    eshell="/sbin/nologin" ;;
+			Darwin) eshell="/usr/sbin/nologin" ;;
+			*) die "Unable to identify the default shell for userland ${USERLAND}"
+		esac
+	fi
+
+	echo "${eshell}"
+}
+
+# @FUNCTION: enewuser
+# @USAGE: <user> [-F] [-M] [uid] [shell] [homedir] [groups]
+# @DESCRIPTION:
+# Same as enewgroup, you are not required to understand how to properly add
+# a user to the system.  The only required parameter is the username.
+# Default uid is (pass -1 for this) next available, default shell is
+# /bin/false, default homedir is /dev/null, and there are no default groups.
+#
+# If -F is passed, enewuser will always enforce specified UID and fail if it
+# can not be assigned.
+# If -M is passed, enewuser does not create the home directory if it does not
+# exist.
+enewuser() {
+	if [[ ${EUID} -ne 0 ]] ; then
+		ewarn "Insufficient privileges to execute ${FUNCNAME[0]}"
+		return 0
+	fi
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	local create_home=1 force_uid=
+	while [[ ${1} == -* ]]; do
+		case ${1} in
+			-F) force_uid=1;;
+			-M) create_home=;;
+			*) die "${FUNCNAME}: invalid option ${1}";;
+		esac
+		shift
+	done
+
+	# get the username
+	local euser=${1}; shift
+	if [[ -z ${euser} ]] ; then
+		eerror "No username specified!"
+		die "Cannot call enewuser without a username"
+	fi
+
+	# lets see if the username already exists
+	if [[ -n $(egetent passwd "${euser}") ]] ; then
+		return 0
+	fi
+	elog "Adding user '${euser}' to your system ..."
+
+	# options to pass to useradd
+	local opts=()
+
+	# handle for ROOT != /
+	[[ -n ${ROOT} ]] && opts+=( --prefix "${ROOT}" )
+
+	# handle uid
+	local euid=${1}; shift
+	if [[ -n ${euid} && ${euid} != -1 ]] ; then
+		if [[ ${euid} -ge 0 ]] ; then
+			if [[ -n $(egetent passwd ${euid}) ]] ; then
+				[[ -n ${force_uid} ]] && die "${FUNCNAME}: UID ${euid} already taken"
+				euid="next"
+			fi
+		else
+			eerror "Userid given but is not greater than or equal to 0!"
+			die "${euid} is not a valid UID"
+		fi
+	else
+		[[ -n ${force_uid} ]] && die "${FUNCNAME}: -F with uid==-1 makes no sense"
+		euid="next"
+	fi
+	if [[ ${euid} == "next" ]] ; then
+		for ((euid = 999; euid >= 101; euid--)); do
+			[[ -z $(egetent passwd ${euid}) ]] && break
+		done
+		[[ ${euid} -ge 101 ]] || die "${FUNCNAME}: no free UID found"
+	fi
+	opts+=( -u ${euid} )
+	elog " - Userid: ${euid}"
+
+	# handle shell
+	local eshell=${1}; shift
+	if [[ ! -z ${eshell} ]] && [[ ${eshell} != "-1" ]] ; then
+		if [[ ! -e ${ROOT}${eshell} ]] ; then
+			eerror "A shell was specified but it does not exist!"
+			die "${eshell} does not exist in ${ROOT}"
+		fi
+		if [[ ${eshell} == */false || ${eshell} == */nologin ]] ; then
+			eerror "Do not specify ${eshell} yourself, use -1"
+			die "Pass '-1' as the shell parameter"
+		fi
+	else
+		eshell=$(user_get_nologin)
+	fi
+	elog " - Shell: ${eshell}"
+	opts+=( -s "${eshell}" )
+
+	# handle homedir
+	local ehome=${1}; shift
+	if [[ -z ${ehome} ]] || [[ ${ehome} == "-1" ]] ; then
+		ehome="/dev/null"
+	fi
+	elog " - Home: ${ehome}"
+	opts+=( -d "${ehome}" )
+
+	# handle groups
+	local egroups=${1}; shift
+	local g egroups_arr
+	IFS="," read -r -a egroups_arr <<<"${egroups}"
+	if [[ ${#egroups_arr[@]} -gt 0 ]] ; then
+		local defgroup exgroups
+		for g in "${egroups_arr[@]}" ; do
+			if [[ -z $(egetent group "${g}") ]] ; then
+				eerror "You must add group ${g} to the system first"
+				die "${g} is not a valid GID"
+			fi
+			if [[ -z ${defgroup} ]] ; then
+				defgroup=${g}
+			else
+				exgroups+=",${g}"
+			fi
+		done
+		opts+=( -g "${defgroup}" )
+		if [[ ! -z ${exgroups} ]] ; then
+			opts+=( -G "${exgroups:1}" )
+		fi
+	fi
+	elog " - Groups: ${egroups:-(none)}"
+
+	# handle extra args
+	if [[ $# -gt 0 ]] ; then
+		die "extra arguments no longer supported; please file a bug"
+	else
+		local comment="added by portage for ${PN}"
+		opts+=( -c "${comment}" )
+		elog " - GECOS: ${comment}"
+	fi
+
+	# add the user
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		pw useradd "${euser}" "${opts[@]}" || die
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix option."
+			ewarn "Please use: \"useradd ${opts[@]} ${euser}\" in a chroot"
+		else
+			useradd "${opts[@]}" "${euser}" || die
+		fi
+		;;
+
+	*-openbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "OpenBSD's usermod does not support --prefix option."
+			ewarn "Please use: \"useradd ${opts[@]} ${euser}\" in a chroot"
+		else
+			# all ops the same, except the -g vs -g/-G ...
+			useradd -u ${euid} -s "${eshell}" \
+				-d "${ehome}" -g "${egroups}" "${euser}" || die
+		fi
+
+		;;
+
+	*)
+		useradd -M -N -r "${opts[@]}" "${euser}" || die
+		;;
+	esac
+
+	if [[ -n ${create_home} && ! -e ${ROOT}/${ehome} ]] ; then
+		elog " - Creating ${ehome} in ${ROOT}"
+		mkdir -p "${ROOT}/${ehome}"
+		# Use UID if we are in another ROOT than /
+		if [[ -n "${ROOT}" ]]; then
+			euser=$(egetent passwd ${euser} | cut -d: -f3)
+		fi
+		chown "${euser}" "${ROOT}/${ehome}"
+		chmod 755 "${ROOT}/${ehome}"
+	fi
+}
+
+# @FUNCTION: enewgroup
+# @USAGE: <group> [gid]
+# @DESCRIPTION:
+# This function does not require you to understand how to properly add a
+# group to the system.  Just give it a group name to add and enewgroup will
+# do the rest.  You may specify the gid for the group or allow the group to
+# allocate the next available one.
+#
+# If -F is passed, enewgroup will always enforce specified GID and fail if it
+# can not be assigned.
+enewgroup() {
+	if [[ ${EUID} -ne 0 ]] ; then
+		ewarn "Insufficient privileges to execute ${FUNCNAME[0]}"
+		return 0
+	fi
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	local force_gid=
+	while [[ ${1} == -* ]]; do
+		case ${1} in
+			-F) force_gid=1;;
+			*) die "${FUNCNAME}: invalid option ${1}";;
+		esac
+		shift
+	done
+
+	# get the group
+	local egroup=${1}; shift
+	if [[ -z ${egroup} ]] ; then
+		eerror "No group specified!"
+		die "Cannot call enewgroup without a group"
+	fi
+
+	# see if group already exists
+	if [[ -n $(egetent group "${egroup}") ]] ; then
+		return 0
+	fi
+	elog "Adding group '${egroup}' to your system ..."
+
+	# handle gid
+	local egid=${1}; shift
+	if [[ -n ${egid} && ${egid} != -1 ]] ; then
+		if [[ ${egid} -ge 0 ]] ; then
+			if [[ -n $(egetent group ${egid}) ]] ; then
+				[[ -n ${force_gid} ]] && die "${FUNCNAME}: GID ${egid} already taken"
+				egid="next available; requested gid taken"
+			fi
+		else
+			eerror "Groupid given but is not greater than or equal to 0!"
+			die "${egid} is not a valid GID"
+		fi
+	else
+		[[ -n ${force_gid} ]] && die "${FUNCNAME}: -F with gid==-1 makes no sense"
+		egid="next available"
+	fi
+	elog " - Groupid: ${egid}"
+
+	# handle different ROOT
+	local opts
+	[[ -n ${ROOT} ]] && opts=( --prefix "${ROOT}" )
+
+	# handle extra
+	if [[ $# -gt 0 ]] ; then
+		die "extra arguments no longer supported; please file a bug"
+	fi
+
+	# Some targets need to find the next available GID manually
+	_enewgroup_next_gid() {
+		if [[ ${egid} == *[!0-9]* ]] ; then
+			# Non numeric
+			for ((egid = 999; egid >= 101; egid--)) ; do
+				[[ -z $(egetent group ${egid}) ]] && break
+			done
+			[[ ${egid} -ge 101 ]] || die "${FUNCNAME}: no free GID found"
+		fi
+	}
+
+	# add the group
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		_enewgroup_next_gid
+		pw groupadd "${opts[@]}" "${egroup}" -g ${egid} || die
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix <dir> option."
+			ewarn "Please use: \"groupadd -g ${egid} ${opts[@]} ${egroup}\" in a chroot"
+		else
+			_enewgroup_next_gid
+			groupadd -g ${egid} "${opts[@]}" "${egroup}" || die
+		fi
+		;;
+
+	*)
+		if [[ ${egid} == *[!0-9]* ]] ; then
+			# Non numeric; let groupadd figure out a GID for us
+			#
+			true # Do nothing but keep the previous comment.
+		else
+			opts+=( -g ${egid} )
+		fi
+		# We specify -r so that we get a GID in the system range from login.defs
+		groupadd -r "${opts[@]}" "${egroup}" || die
+		;;
+	esac
+}
+
+# @FUNCTION: esethome
+# @USAGE: <user> <homedir>
+# @DESCRIPTION:
+# Update the home directory in a platform-agnostic way.
+# Required parameters is the username and the new home directory.
+# Specify -1 if you want to set home to the enewuser default
+# of /dev/null.
+# If the new home directory does not exist, it is created.
+# Any previously existing home directory is NOT moved.
+esethome() {
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	# get the username
+	local euser=${1}; shift
+	if [[ -z ${euser} ]] ; then
+		eerror "No username specified!"
+		die "Cannot call esethome without a username"
+	fi
+
+	# lets see if the username already exists
+	if [[ -z $(egetent passwd "${euser}") ]] ; then
+		ewarn "User does not exist, cannot set home dir -- skipping."
+		return 1
+	fi
+
+	# Handle different ROOT
+	local opts
+	[[ -n ${ROOT} ]] && opts=( --prefix "${ROOT}" )
+
+	# handle homedir
+	local ehome=${1}; shift
+	if [[ -z ${ehome} ]] ; then
+		eerror "No home directory specified!"
+		die "Cannot call esethome without a home directory or '-1'"
+	fi
+
+	if [[ ${ehome} == "-1" ]] ; then
+		ehome="/dev/null"
+	fi
+
+	# exit with no message if home dir is up to date
+	if [[ $(egethome "${euser}") == ${ehome} ]]; then
+		return 0
+	fi
+
+	elog "Updating home for user '${euser}' ..."
+	elog " - Home: ${ehome}"
+
+	# ensure home directory exists, otherwise update will fail
+	if [[ ! -e ${ROOT}/${ehome} ]] ; then
+		elog " - Creating ${ehome} in ${ROOT}"
+		mkdir -p "${ROOT}/${ehome}"
+		chown "${euser}" "${ROOT}/${ehome}"
+		chmod 755 "${ROOT}/${ehome}"
+	fi
+
+	# update the home directory
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		pw usermod "${opts[@]}" "${euser}" -d "${ehome}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update home"
+		eerror "There was an error when attempting to update the home directory for ${euser}"
+		eerror "Please update it manually on your system:"
+		eerror "\t pw usermod \"${euser}\" -d \"${ehome}\""
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix <dir> option."
+			ewarn "Please use: \"usermod ${opts[@]} -d ${ehome} ${euser}\" in a chroot"
+		else
+			usermod "${opts[@]}" -d "${ehome}" "${euser}" && return 0
+			[[ $? == 8 ]] && eerror "${euser} is in use, cannot update home"
+			eerror "There was an error when attempting to update the home directory for ${euser}"
+			eerror "Please update it manually on your system (as root):"
+			eerror "\t usermod -d \"${ehome}\" \"${euser}\""
+		fi
+		;;
+
+	*)
+		usermod "${opts[@]}" -d "${ehome}" "${euser}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update home"
+		eerror "There was an error when attempting to update the home directory for ${euser}"
+		eerror "Please update it manually on your system (as root):"
+		eerror "\t usermod -d \"${ehome}\" \"${euser}\""
+		;;
+	esac
+}
+
+# @FUNCTION: esetshell
+# @USAGE: <user> <shell>
+# @DESCRIPTION:
+# Update the shell in a platform-agnostic way.
+# Required parameters is the username and the new shell.
+# Specify -1 if you want to set shell to platform-specific nologin.
+esetshell() {
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	# get the username
+	local euser=${1}; shift
+	if [[ -z ${euser} ]] ; then
+		eerror "No username specified!"
+		die "Cannot call esetshell without a username"
+	fi
+
+	# lets see if the username already exists
+	if [[ -z $(egetent passwd "${euser}") ]] ; then
+		ewarn "User does not exist, cannot set shell -- skipping."
+		return 1
+	fi
+
+	# Handle different ROOT
+	local opts
+	[[ -n ${ROOT} ]] && opts=( --prefix "${ROOT}" )
+
+	# handle shell
+	local eshell=${1}; shift
+	if [[ -z ${eshell} ]] ; then
+		eerror "No shell specified!"
+		die "Cannot call esetshell without a shell or '-1'"
+	fi
+
+	if [[ ${eshell} == "-1" ]] ; then
+		eshell=$(user_get_nologin)
+	fi
+
+	# exit with no message if shell is up to date
+	if [[ $(egetshell "${euser}") == ${eshell} ]]; then
+		return 0
+	fi
+
+	elog "Updating shell for user '${euser}' ..."
+	elog " - Shell: ${eshell}"
+
+	# update the shell
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		pw usermod "${opts[@]}" "${euser}" -s "${eshell}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update shell"
+		eerror "There was an error when attempting to update the shell for ${euser}"
+		eerror "Please update it manually on your system:"
+		eerror "\t pw usermod \"${euser}\" -s \"${eshell}\""
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix <dir> option."
+			ewarn "Please use: \"usermod ${opts[@]} -s ${eshell} ${euser}\" in a chroot"
+		else
+			usermod "${opts[@]}" -s "${eshell}" "${euser}" && return 0
+			[[ $? == 8 ]] && eerror "${euser} is in use, cannot update shell"
+			eerror "There was an error when attempting to update the shell for ${euser}"
+			eerror "Please update it manually on your system (as root):"
+			eerror "\t usermod -s \"${eshell}\" \"${euser}\""
+		fi
+		;;
+
+	*)
+		usermod "${opts[@]}" -s "${eshell}" "${euser}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update shell"
+		eerror "There was an error when attempting to update the shell for ${euser}"
+		eerror "Please update it manually on your system (as root):"
+		eerror "\t usermod -s \"${eshell}\" \"${euser}\""
+		;;
+	esac
+}
+
+# @FUNCTION: esetcomment
+# @USAGE: <user> <comment>
+# @DESCRIPTION:
+# Update the comment field in a platform-agnostic way.
+# Required parameters is the username and the new comment.
+esetcomment() {
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	# get the username
+	local euser=${1}; shift
+	if [[ -z ${euser} ]] ; then
+		eerror "No username specified!"
+		die "Cannot call esetcomment without a username"
+	fi
+
+	# lets see if the username already exists
+	if [[ -z $(egetent passwd "${euser}") ]] ; then
+		ewarn "User does not exist, cannot set comment -- skipping."
+		return 1
+	fi
+
+	# Handle different ROOT
+	local opts
+	[[ -n ${ROOT} ]] && opts=( --prefix "${ROOT}" )
+
+	# handle comment
+	local ecomment=${1}; shift
+	if [[ -z ${ecomment} ]] ; then
+		eerror "No comment specified!"
+		die "Cannot call esetcomment without a comment"
+	fi
+
+	# exit with no message if comment is up to date
+	if [[ $(egetcomment "${euser}") == ${ecomment} ]]; then
+		return 0
+	fi
+
+	elog "Updating comment for user '${euser}' ..."
+	elog " - Comment: ${ecomment}"
+
+	# update the comment
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		pw usermod "${opts[@]}" "${euser}" -c "${ecomment}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update comment"
+		eerror "There was an error when attempting to update the comment for ${euser}"
+		eerror "Please update it manually on your system:"
+		eerror "\t pw usermod \"${euser}\" -c \"${ecomment}\""
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix <dir> option."
+			ewarn "Please use: \"usermod ${opts[@]} -c ${ecomment} ${euser}\" in a chroot"
+		else
+			usermod "${opts[@]}" -c "${ecomment}" "${euser}" && return 0
+			[[ $? == 8 ]] && eerror "${euser} is in use, cannot update shell"
+			eerror "There was an error when attempting to update the shell for ${euser}"
+			eerror "Please update it manually on your system (as root):"
+			eerror "\t usermod -s \"${eshell}\" \"${euser}\""
+		fi
+		;;
+
+	*)
+		usermod "${opts[@]}" -c "${ecomment}" "${euser}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update comment"
+		eerror "There was an error when attempting to update the comment for ${euser}"
+		eerror "Please update it manually on your system (as root):"
+		eerror "\t usermod -c \"${ecomment}\" \"${euser}\""
+		;;
+	esac
+}
+
+# @FUNCTION: esetgroups
+# @USAGE: <user> <groups>
+# @DESCRIPTION:
+# Update the group field in a platform-agnostic way.
+# Required parameters is the username and the new list of groups,
+# primary group first.
+esetgroups() {
+	_user_assert_pkg_phase ${FUNCNAME}
+
+	[[ ${#} -eq 2 ]] || die "Usage: ${FUNCNAME} <user> <groups>"
+
+	# get the username
+	local euser=${1}; shift
+
+	# lets see if the username already exists
+	if [[ -z $(egetent passwd "${euser}") ]] ; then
+		ewarn "User does not exist, cannot set group -- skipping."
+		return 1
+	fi
+
+	# handle group
+	local egroups=${1}; shift
+
+	local g egroups_arr=()
+	IFS="," read -r -a egroups_arr <<<"${egroups}"
+	[[ ${#egroups_arr[@]} -gt 0 ]] || die "${FUNCNAME}: no groups specified"
+
+	for g in "${egroups_arr[@]}" ; do
+		if [[ -z $(egetent group "${g}") ]] ; then
+			eerror "You must add group ${g} to the system first"
+			die "${g} is not a valid GID"
+		fi
+	done
+
+	local defgroup=${egroups_arr[0]} exgroups_arr=()
+	# sort supplementary groups to make comparison possible
+	readarray -t exgroups_arr < <(printf '%s\n' "${egroups_arr[@]:1}" | sort)
+	local exgroups=${exgroups_arr[*]}
+	exgroups=${exgroups// /,}
+	egroups=${defgroup}${exgroups:+,${exgroups}}
+
+	# exit with no message if group membership is up to date
+	if [[ $(egetgroups "${euser}") == ${egroups} ]]; then
+		return 0
+	fi
+
+	local opts=( -g "${defgroup}" -G "${exgroups}" )
+	elog "Updating groups for user '${euser}' ..."
+	elog " - Groups: ${egroups}"
+
+	# Handle different ROOT
+	[[ -n ${ROOT} ]] && opts+=( --prefix "${ROOT}" )
+
+	# update the group
+	case ${CHOST} in
+	*-freebsd*|*-dragonfly*)
+		pw usermod "${euser}" "${opts[@]}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update groups"
+		eerror "There was an error when attempting to update the groups for ${euser}"
+		eerror "Please update it manually on your system:"
+		eerror "\t pw usermod \"${euser}\" ${opts[*]}"
+		;;
+
+	*-netbsd*)
+		if [[ -n "${ROOT}" ]]; then
+			ewarn "NetBSD's usermod does not support --prefix <dir> option."
+			ewarn "Please use: \"usermod ${opts[@]} ${euser}\" in a chroot"
+		else
+			usermod "${opts[@]}" "${euser}" && return 0
+			[[ $? == 8 ]] && eerror "${euser} is in use, cannot update shell"
+			eerror "There was an error when attempting to update the shell for ${euser}"
+			eerror "Please update it manually on your system (as root):"
+			eerror "\t usermod -s \"${eshell}\" \"${euser}\""
+		fi
+		;;
+
+	*)
+		usermod "${opts[@]}" "${euser}" && return 0
+		[[ $? == 8 ]] && eerror "${euser} is in use, cannot update groups"
+		eerror "There was an error when attempting to update the groups for ${euser}"
+		eerror "Please update it manually on your system (as root):"
+		eerror "\t usermod ${opts[*]} \"${euser}\""
+		;;
+	esac
+}
+
+fi